We investigate the role of limited access to airport facilities as a determinant of the hub premium in the U.S. airline industry. We use original data from competition plans that airports are required to submit to the U.S. Department of Transportation in compliance with the Aviation Investment...

We investigate the success of legislation aimed at increasing competition at highly concentrated major US airports, mainly by forcing these airports to increase the availability of scarce airport facilities to new entrants. We use a multi-dimensional regression-discontinuity approach to exploit...

We provide empirical evidence that multimarket contact facilitates tacit collusion among airlines using a flexible model of oligopolistic behavior, where conduct parameters are modeled as functions of multimarket contact. We find i) carriers with little multimarket contact do not cooperate in...

We identify the rate of off-label use of prescription drugs in the United States during 1993-2008 using Detection Controlled Estimation. We find the rate rises from 29.9% to 38.3% during this period. Off-label prescribing increases when there are fewer FDA-approved alternatives and a patient's...

The federal government now confronts considerable political pressure to add CO2 to the existing set of criteria air pollutants. As with current criteria pollutants, proposals call for control of CO2, assuming that the control of the each of the three criteria pollutants is separable from the...

In Paragraph (iv) pharmaceutical cases, a patent-litigation decision often determines whether a brand-firm monopoly continues or generic entry occurs. Using unique patent litigation data and an event-study approach that accounts for probabilistic district court decisions and an appellate...

We analyze subscriber usage data from an Internet Service Provider that sells service using three-part tariff and unlimited plans. Subscribers facing three-part tariffs have lower average usage than subscribers on unlimited plans, and differences among heavy users explain nearly all the overall...